Add pre-commit to CI

References:
* casework/CASE-Utilities-Python#37

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

Author: ajnelson-nist

.github/workflows/web_resources.yml

@@ -37,6 +37,10 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
+    - name: Pre-commit Checks
+      run: |
+        pip -q install pre-commit
+        pre-commit run --all-files
     - name: Clear generated files
       run: make clean
     - name: Regenerate files